/*
 Licensed to the Apache Software Foundation (ASF) under one
 or more contributor license agreements.  See the NOTICE file
 distributed with this work for additional information
 regarding copyright ownership.  The ASF licenses this file
 to you under the Apache License, Version 2.0 (the
 "License"); you may not use this file except in compliance
 with the License.  You may obtain a copy of the License at

 http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing,
 software distributed under the License is distributed on an
 "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 KIND, either express or implied.  See the License for the
 specific language governing permissions and limitations
 under the License.
 */
#define NATIVE_APP_KEYCHAIN_SERVICE_NAME        @"HSBC-KEYCHAIN-SERVICE-NAME"
#define NATIVE_APP_KEYCHAIN_DATA_UUID           @"HSBC-APP-UUID"

#import <UIKit/UIKit.h>
#import "UIDevice+Extensions.h"
#import "KeychainUtils.h"

@implementation UIDevice (org_apache_cordova_UIDevice_Extension)

- (NSString*)uniqueAppInstanceIdentifier
{
    NSUserDefaults* userDefaults = [NSUserDefaults standardUserDefaults];
    static NSString* UUID_KEY = @"CDVUUID";
    
    
    NSString* app_uuid = [self getUUIDFromKeychain];
    if (app_uuid == nil) {
        app_uuid = [userDefaults stringForKey:UUID_KEY];
        if (app_uuid) {
            [self createUUIDIntoKeychain:app_uuid];
        }
    }
    

    if (app_uuid == nil) {
        CFUUIDRef uuidRef = CFUUIDCreate(kCFAllocatorDefault);
        CFStringRef uuidString = CFUUIDCreateString(kCFAllocatorDefault, uuidRef);
        
        app_uuid = [NSString stringWithString:(__bridge NSString*)uuidString];
        [self createUUIDIntoKeychain:app_uuid];
        
        CFRelease(uuidString);
        CFRelease(uuidRef);
        
    }
    
    return app_uuid;
}

+ (BOOL)isPad
{
    BOOL iPadDevice = NO;
    
    // Is userInterfaceIdiom available?
    if ([[UIDevice currentDevice] respondsToSelector:@selector(userInterfaceIdiom)])
    {
        // Is device an iPad?
        if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad)
            iPadDevice = YES;
    }
    
    return iPadDevice;
}


- (void) createUUIDIntoKeychain:(NSString *)UUID
{
    NSError *error;
    [KeychainUtils addItemIntoKeychain:NATIVE_APP_KEYCHAIN_DATA_UUID andValue:UUID forServiceName:NATIVE_APP_KEYCHAIN_SERVICE_NAME updateExisting:YES error:&error];
    
    if ([error code] != noErr)
    {
        NSLog(@"createUUIDIntoKeychain error %@",[error description]);
    }
}

- (NSString *) getUUIDFromKeychain
{
    NSError *error;
    NSString *UUID = [KeychainUtils getItemFromKeychain:NATIVE_APP_KEYCHAIN_DATA_UUID forServiceName:NATIVE_APP_KEYCHAIN_SERVICE_NAME error:&error];
    
    if ([error code] != noErr)
    {
        NSLog(@"createUUIDIntoKeychain error %@",[error description]);
    }
    
    return UUID;
}


@end
